Choose a mattress that fits.
Match the mattress to your frame, leave room around the whole bed, and check how the mattress reaches your bedroom.
Common U.S. mattress sizes
Nominal mattress sizes in inches. Actual dimensions can vary by brand; check the listing and your frame’s specifications.
| Size | Width × length |
|---|---|
| Twin | 38 × 75 in |
| Twin XL | 38 × 80 in |
| Full | 54 × 75 in |
| Queen | 60 × 80 in |
| King | 76 × 80 in |
| California king | 72 × 84 in |
Browse by size
These links open Amazon search results so you can compare available mattresses. They are not tested product recommendations.
Start with your space
- Measure the room and delivery route
- Preview the room and its colors
- Compare the pieces below, then check exact product dimensions with the seller.
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One sleeper, different lengths
38 × 75 in or 38 × 80 in
Typical size to test, not a listing specification
Twin XL adds 5 inches of length. Check the frame and sheet label: standard twin sheets may not fit Twin XL.
Browse twin & twin xl on Amazon ↗Compare floor space before upgrading
54 × 75 in or 60 × 80 in
Typical size to test, not a listing specification
A queen adds 6 inches of width and 5 inches of length over a full. Check the bed frame’s outside dimensions as well.
Browse full & queen on Amazon ↗Check width versus length
King 76 × 80 in; California king 72 × 84 in
Typical size to test, not a listing specification
A California king is narrower and longer than a standard king. Confirm the exact frame, sheets and delivery package.
Browse king sizes on Amazon ↗Before you buy
- Measure the inside of your bed frame and the outside footprint of the full bed, including the headboard.
- Check mattress height against your frame, sheets and preferred height to get in and out of bed.
- Review the listing’s materials, trial and return terms, delivery box size and expansion instructions.